title: Selective gas transport through few-layered graphene and graphene oxide membranes.
abstract: Graphene is a distinct two-dimensional material that offers a wide range of opportunities for membrane applications because of ultimate thinness, flexibility, chemical stability, and mechanical strength. We demonstrate that few- and several-layered graphene and graphene oxide (GO) sheets can be engineered to exhibit the desired gas separation characteristics. Selective gas diffusion can be achieved by controlling gas flow channels and pores via different stacking methods. For layered (3- to 10-nanometer) GO membranes, tunable gas transport behavior was strongly dependent on the degree of interlocking within the GO stacking structure. High carbon dioxide/nitrogen selectivity was achieved by well-interlocked GO membranes in high relative humidity, which is most suitable for postcombustion carbon dioxide capture processes, including a humidified feed stream.
authors.affiliation: Department of Energy Engineering, Hanyang University, Seoul 133-791, Republic of Korea.
authors.forename: Hyo Won
authors.initials: HW
authors.lastname: Kim
authors.forename: Hee Wook
authors.initials: HW
authors.lastname: Yoon
authors.forename: Seon-Mi
authors.initials: SM
authors.lastname: Yoon
authors.forename: Byung Min
authors.initials: BM
authors.lastname: Yoo
authors.forename: Byung Kook
authors.initials: BK
authors.lastname: Ahn
authors.forename: Young Hoon
authors.initials: YH
authors.lastname: Cho
authors.forename: Hye Jin
authors.initials: HJ
authors.lastname: Shin
authors.forename: Hoichang
authors.initials: H
authors.lastname: Yang
authors.forename: Ungyu
authors.initials: U
authors.lastname: Paik
authors.forename: Soongeun
authors.initials: S
authors.lastname: Kwon
authors.forename: Jae-Young
authors.initials: JY
authors.lastname: Choi
authors.forename: Ho Bum
authors.initials: HB
authors.lastname: Park